Every site that does "verification" seems to also prohibit anonymity (like this one seems to do). But I don't think that needs to be. Imagine a site that does

Every site that does "verification" seems to also prohibit anonymity (like this one seems to do). But I don't think that needs to be. Imagine a site that does ID verification. Add OAuth and now other sites can integrate (similar to login with Google). However, instead of passing name, user ID, and email the verification site can pass an anonymous ID. With that approach you get 1-to-1 guarantees for human-to-account, preventing sock puppet accounts, users who create new accounts when banned, etc. But, the other sites never know who the user actually is. Its anonymzing proxy meets OAuth single sign on. Anyone know existing site that do anything like that?